Snowthrower impeller



FIG. 1 is a perspective view of a snowthrower impeller, showing my new design, the snowthrower shown in broken lines is for illustrative purposes only, and forms no part of the claimed design;

FIG. 2 is an enlarged perspective view thereof;

FIG. 3 is a further enlarged front elevational view thereof;

FIG. 4 is a further enlarged rear elevational view thereof;

FIG. 5 is a further enlarged top plan view thereof;

FIG. 6 is a further enlarged bottom plan view thereof;

FIG. 7 is a further enlarged right end elevational view thereof;

FIG. 8 is a further enlarged left end elevational view thereof;

FIG. 9 is a further enlarged sectional view thereof, taken on line 9--9 of FIG. 3;

FIG. 10 is a further enlarged sectional view thereof, taken on line 10--10 of FIG. 3;

FIG. 11 is a further enlarged sectional view thereof, taken on line 11--11 of FIG. 3; and

FIG. 12 is a further enlarged sectional view thereof, taken on line 12--12 of FIG. 3. 

The ornamental design for a snowthrower impeller, as shown and described. 